Taylor Swift‘s ‘1989’ is officially louder than AC/DC’s ‘Back In Black’, according to a study conducted by a mastering engineer.

Ian Shepherd is the founder of Dynamic Range Day and, as Billboard reports, carried out a study comparing the volume of popular albums. According to Shepherd’s study, Swift’s ‘1989’ clocked in at a DR6 rating, which makes it much louder than both ‘Back In Black’ and Metallica’s ‘The Black Album’ (DR12 and DR11 respectively).

‘1989’ also registered as being louder than Radiohead’s ‘OK Computer’, Jack White’s ‘Lazaretto’ and Pink Floyd’s ‘Dark Side Of The Moon’. The loudest albums in the study are Metallica’s ‘Death Magnetic’, which reached a DR3 level, and Skrillex’s ‘Recess’, which charted at DR4. See Shepherd’s full study and explanation for his findings here.

As was reported earlier this week, Taylor Swift’s ‘1989’ album has officially gone double platinum in the UK. The singer’s fifth studio LP has now sold over 600,000 copies in the country since it was first released last October. Swift recently spoke out about the ‘public humiliation’ she faced over her love life and has deemed the public’s reaction as ‘unfair’. “There is no easy way for me to engage with romance. I’m really busy, so I can’t. And it’s a good thing that I feel really independent and I feel that my friends are all I need,” she said. “It’s kind of a sad way I got there though, being shamed into it.”